HowTo confgure TeamCity Server so it can report to Github that PR build is started and finished with Success / Error?

Hi, we've enabled Github Pull-Request testing on TeamCity. TC works fine, and we would like to find out HowTo

1. Make TC report back to Github and notify that Build job has been started. We would like to show TC Build job link also

2. Make TC report back to Github and show that build job succeeded or failed.

That is all we see right now. TC build jobs start silently w/o any feedback to developer

We would like to see three states:

1. TC build job has been started

2. TC build job successfully finished

3. TC Build job failed and shouldn't be merged.